Permutation-lock.



JOHN A. MGCOACH, 0F BOICOURT KANSAS PERMUTATION-LOCK.

Specification of Letters Patent.

Patented Dec. 28, 1915;

Application fi1ed=Apri128, 1915. :Seria11 1o.23,91 7.

To elite/ m dim/cry concern Bent know nwthat 1', J HN A. MoCoAoir, a citizen-inf .the' Un1tecl=-States, residing-at Boicourtpin the=county of Linn and State of Kansas,.:have invented certain new and useful Improvements in PermutationLo cks and L d-odeclare the following to be a full, clear, and-exact description of the invention,

such-as will enable othersskilled in the art.

to whichit appertains to make and" use the neck Myinvention relates to improvements in \wardly into contact withtthe permutation lock siand latches and more; particularly to the former of thepermutation type he objectof the invention is to provide a lock of thisiclass possessingvas few parts as possible, yet 0ne;which although .of such simpleconstruction will be highly etlicient 1n operation flIlClwWlll possessa number; of

advantageous features.

With this general object in view, the in ventionresides-in certain novel features of construction and in unique combinations-.-

hereinafter fully described and claimed'and shown in the drawing wherein like reference characters designate; corresponding parts throughout the several views and wherein:

Figure 1-is asectionalview-of a lock constructed in accordance with-myinvention with the bolt projecting rand retracting means therefor in inactive position; Fig. :2

is a similar View showing such retracting means disposed for retractinglthe bolt; Fig. 3 is a horizontal sectionas .seenalong the plane indicated by the line 3- 8 ofFigz. 1; Fig. 1 is a disassembled perspective view of the bolt retracting ;means,-..and"Fig...5 is a similar view'of the bolt.

In this drawing which constitutes -a part of the application, the numeral 1 designates a fiatrectangular: casing which may be constructed in any preferred manner, one :end 1 wall of this casingbeing shown. in the present embodiment of the invention as provided with a rectangular. opening 2. through which the outer beveled end. 3 of a horizontally disposed locking bolt 1 is normally projQCtQCl-x The bolt 4; is provided at a suitable point, shownin the drawing upon its lower side, with a. stop5 whichabuts one endwall of the casingand. limits the outward movement ofsaid bolt *as clearly .disclosedin Figs.v 1 andwZ. Theinner endioi-f the bolt 4: is providedavith. a rearwardlyaextending.

6.. formedrintegrally with and; extend-- ..umdlyitreBa-tlwa nesianc erenf tit innerend, saidneck being providedon its undersidepat theinner end thereof, wlth a the'opening 2 by any preferred typepof spring 8 here shown in the form of a flat 1 leaf spring secured at its lower end. to the lower sideofthe-caslng 1 While ltsupper endbears against the rear end of the bolt directly beneath the fixedend of theneck 6, the-latter being normally. forced downbolt retractingmeans M by a suitable spring 9 interposed between saidv neck and the tip- 1 pcrside of the casing 1.

The means M above mentioned comprises a shaft 10 -which is passedtransversely through the opposite sides of the casing 1 and Will-Chis providedtwith a. knurled head p 11 at onev of its ends, the xportion .of the shaft immediately adjacent the inner side of;

said head beingof polygonal formation as dlsclosed at 12,. whilethe O13POSlt:,8l'ld of said shaft is threaded as clearly disclosed.

in Figs. 3 and 4;. The polygonalportion12 of the shaft110 is passed through a polygonal opening in an.indicating dial. 13 hav-..

ing thereon a. series of lettered or numbered graduations, this dial. being disposed adja' 1 cent the side of the casing 1 which is eX- posed to view when the lock is appliedto use, and being'adapted for-ooaction with an immovable. indicator 1 1 which 1s secured.

to this:side of1the:casingas indicated-in Fig. 3, it bemg evidentthat suchindicator may be positioned. at anydesired point-..

Furthermore, it is to be understood that should the lock-be mortisedinto the edge of v a door or the like, the dial-18 and indicator 14: will not. be disposed immediately adjacent the side of the casing 1, butwill be posi-, tioned on oneside-of the door The 'polygonalportion v12, in addition-to being passed throughv thedial 1.3, is inserted through poly-sided openings in awasher- 15 which contacts with theinnerv side'ofthe front wall of the casing 1, and through a disk 16 having in its peripheral edge a pair of notchestlfl, while projecting longitudinally from the diskc 16 away: from the washer 15, is a. rigidpin-18-..Disposed.on the cylindrical portionsof the shaf.t l 0..-and

in contact with the side \oftthedisk 16 re mote-from thetwasher. l5,,i's ai-secondrwasher washer remote from the disk 16, is a second and rotatable disk 16 having in its peripheral edge a pair of spaced notches 17 adapted at times to aline with the notches 17. In addition to the notches 17, the disk 16" is provided with an arcuate slot 18 disposed concentric to the edge of said disk and re ceiving therein the pin 18, the slot in question being extended only throughout approximately a quarter of the circumference of the disk for reasons to become obvious as the description proceeds.

Inaddition to the disk 16 which is immovable on the shaft 10, and the disk 16 which is rotatable thereon, an additional disk 16 is rotatably mounted on said shaft and is spaced from the disk 16 by a washer 20, the disk 16 being provided in its peripheral edge with a pair of spaced notches 17 adapted to aline with the notches 17 and 1'7 for the purpose of allowing the teeth 7 of the neck 6 to drop into the same, whereupon when the shaft l0 is rotated by its head 11, the bolt 4 may be withdrawn. The means for rotating the disk 16 upon the shaft to properly position its notches 17", is constituted by the pin 18 which projects through the slot 18 and into an additional and longer arcuate slot 18 formed through the disk 16 concentric with the peripheral edge thereof.

Securing the several disks and washers, and the dial 13 in proper position upon the shaft 10, is a nut 21 disposed on the threaded end of said shaft, a washer 22 being preferably interposed between the nut 21 and the innermost disk 16". By reference more particularly to Figs. 3 and 4, it will be observed that the shaft 10 continues beyond the nut 21 and that said shaft is here reduced to provide a bearing journal 23 which is received by an appropriate bearing formed in one side of the casing 1.

When the several parts of the lock are assembled as shown in Figs. 1, 2 and 3, a brake spring 24 bears against the alined peripheral edges of the three disks 16, 16 and 16, thus frictionally locking the same against rotation until the shaft 10 is actuated in the proper manner to produce this result. In so actuating the shaft, the knob 11 is turned to rotate said shaft until one of the numbered graduations on the dial 13 alines with the indicator 14. By this time, the pin 18 has come into contact with one end of theslot 18 and has thereby rotated the disk 16 to the position shown in Fig. 1, thus disposing its pair of notches upwardly directly beneath the teeth 7. The knob 11 is now rotated in the reverse direction, thus causing the pin 18 to strike one end of the slot 18, whereupon the disk l6 will be rotated to dispose its notches 17 in alinement with the notches 17 the proper amount of rotation for this purpose being ascertained by the dial 13 and the indicator 14. Needless to say, the brake spring 24- which has previously retained the disk 16 in its adjusted position, now also frictionally locks the disk 16 against rotation, while the knob 11 is rotated again in the direction in which it was first turned, whereupon the pin 18 travels loosely within the slots to allow the disk 16 to be shifted the proper amount for alining its notches 17 with the previously alined notches 17 and 17". Needless to say, the position of the disk 16 is likewise disclosed to the legitimate operator of the lock by the relation of the dial 13 and indicator 14.

The moment the several pairs of notches are alined the spring 9 forces the entire inner end of the bolt downwardly and disposes the teeth 7 in said notches, whereupon turning of the knob 11 in the proper direction will retract the bolt. When this has been done and the door or the closure equipped with the lock has been opened, the knob 11 is turned to such an extent as to allow the teeth 7 to be forced from the alined notches, whereupon the spring 8 will again project the bolt. It will be obvious that the latter may be provided with the beveled end shown in the drawing wherebv it will be automatically retracted when the closure is shut. or that said bolt may have a square end. thus necessitating that it be retracted by its actuating means before the door or the like can be locked.

From the foregoing description, taken in connection with the accompanying drawing, it will be evident that although extremely simple construction has been provided for carrying out the object of the invention, the complete lock will be highly efficient in operation and may be applied to a vast number of uses by making the necessary alterations falling within the scope of the invention.

I claim:

A lock comprising a shaft having at one end an operating knob and at its other end a reduced journal, the portion of said shaft adjacent the knob being squared while the portion contiguous to the journal is externally threaded, a circular indicating plate contacting with the knob and having a central square opening through which the squared portion of the shaft passes, an operating disk spaced from the indicating plate and likewise having a square central opening receiving said squared portion of the shaft, a nut on the threaded portion of said shaft, a plurality of tumbler disks rotatable on the shaft between the nut and the operating disk, all of said disks having peripheral notches to be alined, and pick-up disk operating means actuated by rotation of the operating disk; in combination with a casing having a side interposed between the indicating plate and operating disk, and an 130 additional side having a bearing in which In testimony whereof I have hereunto set the journal of the shaft is revolubly mountmy hand in presence of two subscribing Wit- 10 ed, a locking bolt slidable in the casing and nesses.

having a tooth for reception in the notches of the disk When alinod, a spring forcing said bolt normally toward the disks, and a single brake spring bearing against the peripheries of all of the disks.

JOHN A. MoCOAOH.

Witnesses:

A. W. BUSH, F. A. LEASURE.

Copies of this patent may be obtained for five cents eachQby addressing the Commissioner of Patents. Washington, D. 0. 

